User`s guide

EX-SWRA2-IG. C01 iii
Contents
Revision Record.................................................................................................................xiii
About This Guide..............................................................................................................xv
1 Overview of RAID and the RAID Array 200
1.1 What is RAID?........................................................................................................1-1
1.1.1 Implementing RAID through Hardware, or through Software ............................1-2
1.1.2 RAID Levels .....................................................................................................1-2
1.1.2.1 RAID 0..............................................................................................................1-2
1.1.2.2 RAID 1..............................................................................................................1-4
1.1.2.3 RAID 0 + 1........................................................................................................1-5
1.1.2.4 RAID 5..............................................................................................................1-6
1.1.2.5 JBOD ................................................................................................................1-7
1.2 Key Concepts ..........................................................................................................1-8
1.2.1 Disk Array.........................................................................................................1-8
1.2.2 Drive Group ......................................................................................................1-8
1.2.3 Logical RAID Drive ..........................................................................................1-8
1.2.4 Write Caching ...................................................................................................1-8
1.2.4.1 Write-Back Caching ..........................................................................................1-8
1.2.4.2 Write-Through Caching.....................................................................................1-9
1.2.5 Hot Swapping....................................................................................................1-9
1.2.6 Hot Spare ..........................................................................................................1-9
1.3 About the StorageWorks RAID Array 200 Subsystems..........................................1-10
1.3.1 StorageWorks RAID Array 200 Subsystem Components .................................1-10
1.3.2 An Array of Disks in a Storage Enclosure........................................................1-11
1.3.3 A Specialized Array Controller for Implementing a RAID Set.........................1-11
1.3.4 The RAID Array 200 Standalone Configuration Utility....................................1-12
1.3.5 The RAID Array 200 Online Management Utility for Your Operating System.1-12